Comment 14 for bug 1335697

Below some logs that are connected with it and are presented during vm creation in /var/log/syslog:

<3>Nov 24 11:27:08 node-4 kernel: [ 1370.718014] EXT4-fs (nbd5): VFS: Can't find ext4 filesystem
<3>Nov 24 11:27:08 node-4 kernel: [ 1370.721165] FAT-fs (nbd5): bogus number of reserved sectors
<1>Nov 24 11:27:08 node-4 kernel: [ 1370.724521] ffff88005e503000: eb 48 90 00 00 00 00 00 00 00 00 00 00 00 00 00 .H..............
<1>Nov 24 11:27:08 node-4 kernel: [ 1370.728925] ffff88005e503010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
<1>Nov 24 11:27:08 node-4 kernel: [ 1370.736931] ffff88005e503020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
<1>Nov 24 11:27:08 node-4 kernel: [ 1370.743751] ffff88005e503030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 02 ................
<1>Nov 24 11:27:08 node-4 kernel: [ 1370.749295] XFS (nbd5): Internal error xfs_sb_read_verify at line 789 of file /build/buildd/linux-lts-saucy-3.11.0/fs/xfs/xfs_mount.c. Caller 0xffffffffa000b495
<1>Nov 24 11:27:08 node-4 kernel: [ 1370.749295]
<1>Nov 24 11:27:08 node-4 kernel: [ 1370.759078] XFS (nbd5): Corruption detected. Unmount and run xfs_repair
<3>Nov 24 11:27:09 node-4 kernel: [ 1370.802595] block nbd5: Unexpected reply (ffff88005e943c08)
<27>Nov 24 11:27:09 node-4 ntpd[18331]: bind(36) AF_INET6 fe80::d41a:1fff:feea:98be%13#123 flags 0x11 failed: Cannot assign requested address
<27>Nov 24 11:27:09 node-4 ntpd[18331]: unable to create socket on br100 (19) for fe80::d41a:1fff:feea:98be#123
<27>Nov 24 11:27:11 node-4 dnsmasq[21085]: failed to load names from /var/lib/nova/networks/nova-br100.hosts: No such file or directory
<3>Nov 24 12:23:15 node-4 kernel: [ 4737.665315] EXT4-fs (nbd11): VFS: Can't find ext4 filesystem
<3>Nov 24 12:23:15 node-4 kernel: [ 4737.669327] FAT-fs (nbd11): bogus number of reserved sectors
<1>Nov 24 12:23:15 node-4 kernel: [ 4737.672965] ffff88005e840000: eb 48 90 00 00 00 00 00 00 00 00 00 00 00 00 00 .H..............
<1>Nov 24 12:23:15 node-4 kernel: [ 4737.677691] ffff88005e840010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
<1>Nov 24 12:23:15 node-4 kernel: [ 4737.684460] ffff88005e840020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
<1>Nov 24 12:23:15 node-4 kernel: [ 4737.702385] ffff88005e840030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 02 ................
<1>Nov 24 12:23:15 node-4 kernel: [ 4737.707152] XFS (nbd11): Internal error xfs_sb_read_verify at line 789 of file /build/buildd/linux-lts-saucy-3.11.0/fs/xfs/xfs_mount.c. Caller 0xffffffffa000b495
<1>Nov 24 12:23:15 node-4 kernel: [ 4737.707152]
<1>Nov 24 12:23:15 node-4 kernel: [ 4737.716063] XFS (nbd11): Corruption detected. Unmount and run xfs_repair
<3>Nov 24 12:23:16 node-4 kernel: [ 4737.770959] block nbd11: Unexpected reply (ffff88005e8e5c08)

and in dmesg as well.
Looks like nova uses NBD instead of guestfs.